95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
#include "secure.h"
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#include "global.h"
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Secure::Secure()
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{
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}
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char * Secure::Base64Encode(const unsigned char * bindata, char * base64, int binlength)
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{
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int i, j;
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unsigned char current;
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const char * base64char = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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for (i = 0, j = 0; i < binlength; i += 3)
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{
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current = (bindata[i] >> 2);
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current &= (unsigned char)0x3F;
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base64[j++] = base64char[(int)current];
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current = ((unsigned char)(bindata[i] << 4)) & ((unsigned char)0x30);
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if (i + 1 >= binlength)
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{
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base64[j++] = base64char[(int)current];
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base64[j++] = '=';
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base64[j++] = '=';
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break;
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}
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current |= ((unsigned char)(bindata[i + 1] >> 4)) & ((unsigned char)0x0F);
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base64[j++] = base64char[(int)current];
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current = ((unsigned char)(bindata[i + 1] << 2)) & ((unsigned char)0x3C);
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if (i + 2 >= binlength)
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{
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base64[j++] = base64char[(int)current];
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base64[j++] = '=';
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break;
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}
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current |= ((unsigned char)(bindata[i + 2] >> 6)) & ((unsigned char)0x03);
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base64[j++] = base64char[(int)current];
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current = ((unsigned char)bindata[i + 2]) & ((unsigned char)0x3F);
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base64[j++] = base64char[(int)current];
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}
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base64[j] = '\0';
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return base64;
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}
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int Secure::Base64Decode( const char * base64, unsigned char * bindata)
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{
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int i, j;
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unsigned char k;
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unsigned char temp[4];
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const char * base64char = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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for ( i = 0, j = 0; base64[i] != '\0' ; i += 4 )
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{
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memset( temp, 0xFF, sizeof(temp) );
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for ( k = 0 ; k < 64 ; k ++ )
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{
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if ( base64char[k] == base64[i] )
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temp[0]= k;
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}
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for ( k = 0 ; k < 64 ; k ++ )
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{
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if ( base64char[k] == base64[i+1] )
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temp[1]= k;
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}
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for ( k = 0 ; k < 64 ; k ++ )
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{
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if ( base64char[k] == base64[i+2] )
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temp[2]= k;
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}
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for ( k = 0 ; k < 64 ; k ++ )
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{
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if ( base64char[k] == base64[i+3] )
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temp[3]= k;
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}
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bindata[j++] = ((unsigned char)(((unsigned char)(temp[0] << 2))&0xFC)) |
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((unsigned char)((unsigned char)(temp[1]>>4)&0x03));
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if ( base64[i+2] == '=' )
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break;
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bindata[j++] = ((unsigned char)(((unsigned char)(temp[1] << 4))&0xF0)) |
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((unsigned char)((unsigned char)(temp[2]>>2)&0x0F));
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if ( base64[i+3] == '=' )
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break;
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bindata[j++] = ((unsigned char)(((unsigned char)(temp[2] << 6))&0xF0)) |
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((unsigned char)(temp[3]&0x3F));
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}
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return j;
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}
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